/*
 * Copyright (c) 2012, marco.tamburelli@gmail.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.bmi.gwt.mi.server;

import javax.servlet.ServletContext;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

import org.bmi.gwt.mi.server.core.queue.QueuesManager;
import org.bmi.gwt.mi.shared.util.Constants;
import org.bmi.gwt.ws.server.AbstractWebSocketServer;

/**
 * Base service providing web-socket connection and access to the queue box, for
 * queue tasks and operations.
 * 
 * @author marco.tamburelli@gmail.com
 */
@SuppressWarnings("serial")
@WebServlet(name = "MiServiceServlet", urlPatterns = { "/bmi.gwt/service" }, asyncSupported = true)
public class MiService extends AbstractWebSocketServer
{
	@Override
	public MiMessageInbound doCreateWebSocketInbound(String subProtocol, HttpServletRequest request)
	{
		Cookie[] cookies = request.getCookies();
		String credentials = null;

		/*
		 * Credentials can be null, but in such case anyone will be able to
		 * consume messages, causing inconsistent scenario.
		 */

		if (cookies != null) for (int i = 0; i < cookies.length; i++)
			if (cookies[i].getName().equals(Constants.CREDENTIALS_COOKIE_NAME)) credentials = cookies[i].getValue();

		ServletContext appScope = request.getServletContext();
		QueuesManager queuesManager = (QueuesManager) appScope.getAttribute(QueuesManager.class.getName());

		return new MiMessageInbound(this, queuesManager, credentials);
	}
}
